Drivers heading south on Interstate 5 through Bellingham should plan for delays starting this Sunday night, as Washington State Department of Transportation crews begin a three-night repaving project that will reduce the freeway to a single lane.
The work runs from 10 p.m. to 5 a.m. nightly from Sunday, July 19 through Tuesday, July 21. During those hours, southbound I-5 will be reduced to one lane between Northwest Avenue and Meridian Street, covering mileposts 257 through 256. At the same time, the southbound State Route 539 Meridian Street on-ramp to southbound I-5 will also be closed.
What Drivers Need to Know
WSDOT is repaving sections of the southbound freeway in this stretch, a routine maintenance activity that requires dry weather and overnight conditions to complete properly. Asphalt paving operations are temperature and moisture sensitive, and hot mix asphalt must be laid and compacted within a specific temperature window before it cools too much to compact evenly. Night work allows crews to operate without peak-hour traffic volumes, reduces the heat load on fresh pavement from direct summer sun, and minimizes disruption to the thousands of commuters and freight operators who use this corridor during daytime hours.
The agency has noted that one or more nights of work may be rescheduled if rain arrives, which means the schedule could shift beyond July 21 depending on conditions. Drivers should check current road conditions before heading out during those nights if their travel is flexible, as a rescheduled closure would eliminate the restriction on that night. WSDOT typically posts updates on closure cancellations through its online channels.
The Meridian Street corridor is one of Bellingham's busiest freeway access points, connecting the city's northern commercial districts, including the Guide Meridian shopping corridor, the Cordata neighborhood, and the Bellis Fair mall area, to the interstate. Closing the on-ramp will push drivers who would normally access southbound I-5 from Meridian Street to use alternate entry points. The Bakerview Road interchange to the north is the most logical alternative for drivers coming from the northern commercial areas. The Iowa Street interchange further south serves drivers coming from the Barkley neighborhood and the Meridian corridor south of the Bakerview intersection.
Motorists should plan for delays in the single-lane stretch itself, as traffic merging from two lanes into one creates a bottleneck that extends upstream from the merge point. Anyone driving south through Bellingham between 10 p.m. and 5 a.m. during the work window should budget extra time, particularly if heading toward Burlington, Mount Vernon, or the Puget Sound region for an early morning arrival.
Context: Ongoing I-5 Maintenance in Bellingham
This stretch of I-5 between Northwest Avenue and Meridian Street has been an active maintenance zone in recent years. A similar lane reduction occurred near Meridian Street in November 2025 as part of earlier repaving cycles, and the pattern reflects the ongoing challenge of maintaining a heavily used urban freeway section that was built decades ago and has been carrying increasing traffic loads ever since.
The freeway through Bellingham sees heavy use from commuters traveling between Whatcom County communities and employment centers to the south, freight trucks serving the Cherry Point industrial area to the west including the BP refinery, and cross-border traffic between the United States and Canada. That combination of passenger, commercial, and heavy freight traffic accelerates pavement wear faster than on many comparable urban freeways, making regular repaving necessary to prevent the kind of surface deterioration that increases maintenance costs and creates safety hazards.
Bellingham sits at a geographic bottleneck where I-5 narrows as it passes through the city before widening again north of the Meridian interchange. The milepost 256 to 257 segment in question carries a substantial share of the county's economic traffic, and keeping it in good repair is directly tied to the freight reliability and commute predictability that businesses and workers depend on. Deferred pavement maintenance typically costs significantly more to address than timely repaving, making these scheduled projects a cost-effective investment in the long run.
WSDOT manages real-time travel conditions across the state through its online travel map. For up-to-date information on the closure, including whether any nights have been rescheduled due to weather, drivers can check WSDOT's real-time travel map. The agency also posts notices on its social media accounts when scheduled lane closures are confirmed or cancelled.
Alternate Routes and Tips for the Work Window
Drivers who need to head south from Bellingham during the closure nights have a few practical options for avoiding the worst of the delays. Using the Bakerview Road interchange to access I-5 and then merging into the southbound flow well before the construction zone is one approach that avoids the on-ramp closure entirely. Drivers familiar with the local street network can also use Meridian Street itself to travel south to the Iowa Street interchange before getting on the freeway.
Alternatively, State Route 11, also known as Chuckanut Drive, runs south along Bellingham Bay and the Chuckanut sandstone bluffs through Fairhaven and Bow before connecting to the Burlington area. It is a slower route than I-5 but a genuinely scenic one, and for drivers without a time-sensitive reason to use the freeway on a Sunday or Monday night it offers a pleasant alternative without the construction delay.
For freight operators and those whose schedules cannot flex around the closure window, the most straightforward approach is to complete southbound travel before 10 p.m. or wait until after 5 a.m. to avoid the single-lane restriction entirely. The seven-hour window is long enough that with appropriate planning, many trips can be timed around it.
Whatcom County has seen an active summer of road work, including chip seal projects on county roads and various interchange maintenance activities at multiple I-5 access points in and around Bellingham. Keeping an eye on WSDOT's project page and the Whatcom County Public Works website through the summer will help drivers stay ahead of planned closures and avoid being caught off guard by overnight restrictions.
